Impurity Ion Complexation Enhances Carbon Dioxide Reduction Catalysis
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EDTA_Manuscript_ACSCatalysis_Revisions_Final.pdf
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1007.1 KB
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Checksum (MD5)
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Author(s)
Wuttig, Anna
Surendranath, Yogesh
Date Issued
June 2015
Journal
ACS Catalysis
Publisher
American Chemical Society (ACS)
Citation
Wuttig, Anna, and Yogesh Surendranath. “Impurity Ion Complexation Enhances Carbon Dioxide Reduction Catalysis.” ACS Catalysis 5, no. 7 (July 2, 2015): 4479-4484.
Version
Author's final manuscript
Abstract
Herein, we show that group 11 CO[subscript 2] reduction catalysts are rapidly poisoned by progressive deposition of trace metal ion impurities present in high purity electrolytes. Metal impurity deposition was characterized by XPS and in situ stripping voltammetry and is coincident with loss of catalytic activity and selectivity for CO[subscript 2] reduction, favoring hydrogen evolution on poisoned surfaces. Metal deposition can be suppressed by complexing trace metal ion impurities with ethylenediaminetetraacetic acid or solid-supported iminodiacetate resins. Metal ion complexation allows for reproducible, sustained catalytic activity and selectivity for CO[subscript 2] reduction on Au, Ag, and Cu electrodes. Together, this study establishes the principal mode by which group 11 CO[subscript 2] reduction catalysts are poisoned and lays out a general approach for extending the lifetime of electrocatalysts subject to impurity metal deposition.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/acscatal.5b00808
